There is a significant difference in the required elevator position when achieving the three point attitude with power and without due to the increased effectiveness of the elevator when energized with engine power.
When three pointing without power, you will need to arrive with enough airspeed that the elevator is energized. You do not want to arrive 30 feet above the ground with no power and on the ragged edge. You will not achieve a three point attitude. In my airplane at least, I need to aim to a point short of my intended touchdown spot at about 65-70 at idle. I know, it does seem fast. I will then make the round out and start pulling on the stick until I end up with the stick fully aft against the stop when I touch three point. The deceleration is adequate and I don't feel as if I float excessively. I had a very experienced Husky instructor tell me once that he would occasionally have women trim full aft and push against the elevator when on short final because the final pull of the stick all the way back for some is hard if the trim is not set aft and is fighting them. I personally can set the trim in the glide and then pull against the bungees well enough so that I don't need to trim it aft.
When three pointing with power, you can arrive more slowly because the elevator is being energized by the propeller and not by excessive airspeed. My trim is definitely not near full aft when three pointing with power. In fact, sometimes if I have the trim set for the approach, but my power is lower than what I need for the ultimate touchdown, I find that when I add power back in, I need to trim forward unless I want to push against the bungees, but I don't prefer that feeling at touchdown. I like to feel the need to pull back on the stick.
Power is a game changer and also a crutch at times. Know how to get the plane to the correct attitude without power. I believe you will find you need to arrive faster, but that the deceleration happens quickly enough as you transition and start pulling back on the stick. Also know how to arrive at the correct attitude with power. The elevator is much more effective and therefore your stick position will naturally be more forward.
All of my Husky experience is in a new wing 2006 A-1B.